[1]盧文浩,祝嘉喜,黎衛國,等.多柱並聯直流中性母線避雷器均流特性試驗研究[J].高壓電器,2018,54(03):104-108.[doi:10.13296/j.1001-1609.hva.2018.03.015]
 LU Wenhao,ZHU Jiaxi,LI Weiguo,et al.Research on Current Sharing Performance of Parallel-multicolumn Neutral-bus Arrester[J].High Voltage Apparatus,2018,54(03):104-108.[doi:10.13296/j.1001-1609.hva.2018.03.015]
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多柱並聯直流中性母線避雷器均流特性試驗研究()
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《高壓電器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第54卷
期數:
2018年03期
頁碼:
104-108
欄目:
研究與分析
出版日期:
2018-03-15

文章信息/Info

Title:
Research on Current Sharing Performance of Parallel-multicolumn Neutral-bus Arrester
作者:
盧文浩1祝嘉喜2黎衛國1劉婉瑩1
1. 中國南方電網超高壓輸電公司檢修試驗中心, 廣州 510663; 2. 西安西電避雷器有限責任公司, 西安 710200
Author(s):
LU Wenhao1 ZHU Jiaxi2 LI Weiguo1 LIU Wanying1
1. Maintenance & Test Center, CSG EHV Power Transmission Company, Guangzhou 510663, China; 2. Xi’an XD Arrester Co., Ltd., Xi’an 710200, China
關鍵詞:
中性母線避雷器 電流分布系數 均流試驗
Keywords:
neutral-bus arrester current sharing factor current sharing test
DOI:
10.13296/j.1001-1609.hva.2018.03.015
文獻標志碼:
A
摘要:
發生直流線路接地或極母線接地故障時,直流中性母線避雷器將産生很大的能量,爲滿足能量要求,中性母線避雷器采用了多柱並聯的結構。爲避免電流分配不均使某一柱避雷器閥片吸收能量過大損壞,必須嚴格控制多柱並聯避雷器的電流分布不均勻系數。目前判斷多柱並聯避雷器均流特性優劣的方法爲測試通過單柱100~1 000 A的雷電沖擊電流下的不均勻系數不大于1.1。而通過直流中性母線避雷器的電流波形與測試采用的波形相差較大,文中結合直流中性母線避雷器典型電流幅值和波形,開展電流分布試驗,驗證電流分布特性是否符合要求,並分析了沖擊電流大小、波形對電流分布特性的影響。結果表明,在單柱25~500 A的沖擊電流範圍內,隨著電流減小,避雷器電流分布不均勻系數總體呈現增大的趨勢;在小電流下,電流波形對多柱並聯閥片的均流特性基本沒有影響。
Abstract:
Once ground fault occurs on DC transmission line or pole bus-bar, the neutral-bus arresters generate large energy. So the neutral-bus arrester with parallel multicolumn structure is designed. To avoid the valve on one column of the arrester to absorb too much energy because of unequal current distribution, the uneven current distribution factor must be strictly controlled. The common method for judging current sharing performance of the parallel-multicolumn neutral-bus arrester is to test the uneven current distribution factor of the arrester under 100~ 1 000 Astandard lightning current and switching waveform. The national standard requires the uneven current distribution factor no larger than 1.1. However, the current amplitude and waveform of the neutral-bus arrester are quite different from those of test current. This study conducted current sharing test with consideration of typical current amplitude and waveform of the neutral-bus arrester, and analyzed the impacts of current amplitude and waveform on current distributing performance. The results show that the uneven current distribution factor increases gradually with the increase of impulse current in the range from 25 A to 500 A per column, and the current waveform has no effect on the current sharing performance of the valve of parallel multicolumn under low current.

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備注/Memo

備注/Memo:
收稿日期:2017- 09- 14; 修回日期:2017 - 11 - 16.盧文浩(1986—),男,工程師,工學碩士,主要從事高電壓試驗、過電壓與絕緣配合研究工作。
更新日期/Last Update: 2018-02-25